The Letter to the Hebrews, in its great eulogy of the faith of Israel's ancestors, lays special emphasis on Abraham's faith: "By faith, Abraham obeyed when he was called to go out to a place which he was to receive as an inheritance; and he went out, not knowing where he was to go."[4] By faith, he lived as a stranger and pilgrim in the promised land.[5] By faith, Sarah was given to conceive the son of the promise. and by faith Abraham offered his only son in sacrifice.[6]